An Efficient Power-On Base Pressure Prediction Inside the Tube Using Axisymmetric and Quasi-Steady Computation

In this study, an efficient prediction technique is developed to investigate the power-on base pressure of a missile inside the tube during launch phase. Complex flow passage inside the tube is simplified using flow-path modeling. Base pressures on the missile inside the tube are predicted with axisymmetric and quasi-steady computations with a fully turbulent flow assumption. The computational results of base pressures for low and high thrust conditions agree well with measurement data of launch tests. Moreover, flow features related to the generation of the base pressure are demonstrated and discussed with the flow-field data for each thrust condition.